Mold-forming machine.



P. A. PHV lLPs. MOLD FORMP' MACHINE.

APPLICA .1 FILED JAN. 3, 1908.

Patented Mar. 16,1909.

3 SHEETS-SHEET l.

F. A. PHELPS.

MOLD FORMING MACHINE.

APPLIUATION FILED JAN, 3. 190s` Patented Mar. 16, 1909.

a SHEETS-SHEET 2.

I' A PHELPS MOLD FORMING MACHINE.

APPLICATION FILED JAN, s, 1901's.

Witnesses:

9, PWM?.

UNITED STATE ijf-TENT OFFIC.

FREDERICK PHELPS, OI" NEWARK, NEW JERSEY, ASSIGNOR TO TAYLOR IRON SeSTEEL COMPANY, OF HIGI-I BRIDGE, NEW `IERSEY, A CORPORATION OF NEWJERSEY.

MOLD-FORMING MACHNE.

Application filed January 3, 1908.

To all whom it may concern:

Be it known that I, FREDERICK A. PnELPs, a citizen of the United States,residing in Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Mold-Forming Ma- Jphines, of which the following is a specificaion.

The present improvement relates to machines for forming molds, andparticularly molds for gears, the object of the invention being toprovide an improved machine of this class by means of which all of theteeth of the mold may be formed simultaneously and when formed thepattern withdrawn Without liability to roll up the sand and break downthe molded teeth.

A further obj ect of the invention is the provision of an improvedpattern made up of a series of toothed segments, and means forwithdrawing all of the segments radially, thereby to avoid thenecessity, as heretofore, of drawing the pattern out of the sand moldfacewise ofthe molded teeth.

A further object of the invention is the pro*v one-hall"l of thisimproved gear-mold forming vmachine; Fig. 2 is a sectional view of themechanism shown in Fig. 1, illustrating the pattern in position to forma mold with the teeth the full length of the pattern 5 Fig. 3 is asomewhat similar view to Fig. 2, but showing the pattern in elevationadjusted relatively to the mold box so that the face of the mold teethwill be but approximately one-half ci the face ofthe pattern Fig. 4 is aview somewhat similar to Fig. l, with the top plate of the pattern,however, removed, the left hand side illustrating every alternate gearsegment partly withdrawn and the right hand side illustrating all of thegear segments withdrawn, one set, however, to a greater extent than theother, Fig. 5 is a cross-sectional view illustrating the position of thepattern segments as shown at the left-hand side of Fig. 4, Fig. 6 is asimilar cross-sectional view to Fig. 5, but illustrating the positionSpeccation of Letters Patent.

Patented Marclrl, 1909.

Serial N0. 409,201.

of the pattern segments as sh own at the righthand side of Fig. 4, Fig.7 is a partly Sectional view of the segment-supporting drum; Fig. 8 is aperspective view of one of the segments detached; and Fig. 9 is a detailview of one ofthe adjusting devices for regulating the position of thesegment-carrying drum.

Similar characters of reference indicate corresponding parts throughoutthe different figures of the drawings.

In the formation of sand molds for the making of gears, it is desirableto mold all of the teeth simultaneously, but so far as I am aware nopracticable mode of doing this has heretofore been devised except whenthe pattern or mold is withdrawn one from the other facewise, ordepthwise of the molded teeth, and as these gear teeth frequently havesix y to eightinch face, when the pattern is drawn out of the sand itfrequently rolls up the sand surface and breaks down the molded teeth sothat the mold is useless.

By means of the present improvement, in which the pattern is withdrawnfrom the mold by a radial draft, instead of a face draft, that is tosay, the segments forming the pattern are drawn radially away from theteeth i of the sand mold prior to removing the pattern depthwise of themold, I am able not only to mold all ol the teeth at the same time, butam able to withdraw the pattern from the mold without any injurythereto.

This improved mold-forming machine comprises, when assembled for theforming of gear molds, in the preferred embodiment thereof shown in thedrawings, an annular g mold box 2 having a bottom forming thefollow-board 3, which is in the 'l'orm ol' a ring, the edge ol whichconforms to the shape oi the pattern, which, in the present instance, isshown as consisting of gear teeth. rihis is obtained by providing theinner edge 4 ol the l'ollow-board with a dovetail groove 5, and then,when the pattern is in position, pouring in some suitable metal, asYl'or instance zinc, whereby, when such metal has set, the edge 6 of thefollow-board entirely around the pattern will iit such sand pattern andconl'orm thereto.

Located within the opening oi' the mold box and supported by adjustingmeans 7 carried by brackets S secured to the underside of thefollow-board is this improved pattern, which, in the present instance,comprises a drum 9 having an incline periphery 1() provided with aseries of slots 11 therein, preferably corresponding in number with thenumber of segments of which'the pattern is formed. rThis drum issupported for vertical movement on rods 12 carried by top and bottomplates 13 and 14 forming the top and bottom walls of the pattern,movement upwardly and downwardly of said drum being obtained by means of-a hand-wheel 115 journaled in the top plate 13 and having` a screw 16fitting a centrally formed threaded opening 17 in the drum,whereby onthe turning of this hand-wheel the drum will be moved upwardly ordownwardly on its guide rods, the proper positioning of the patternsegments being obtained by means of a micrometer adjusting device 18carried by the top plate and engaging the top of the drum permitting aslight increase vor decrease of diameter of pattern.

rllhe pattern proper is made up of a series of metal segments orsections 20, each having the desired number of pattern faces. In thepresent instance, as the pattern is a 66- tooth gear pattern, threeteeth are taken as a multiple, so that each 'segment is provided withthree teeth or matrices 21. Each such segment is provided with aninclined face 22 at the rear thereof, formed at the same angle as theperiphery of the drum and in position to engage the drum. The segmentsare suitably guided for radial movement, this being obtained in thepresent inst ance by providing the top and bottom of the patternsegments with keys 23 fitting key-ways 24 in the opposed faces of thetop and bottom plates 13 and 14 of the machine. Of course, it is to beunderstood that this construction could be reversed, the plates havingthe keys while the top and bottom plates be provided with the key-ways.

For securing the segments to .the drum, suitable means is provided,consisting of fastening screws 25 threaded into openings 26 in theinclined rear faces of the segmentsand movable in the slots 11 of thedrum, spiral springs 27 being located between enlarged heads 28 of suchfastening devices and collars or washers 29 mounted on the shanks 30 ofsuch fastening devices and engaging the inner face of the inclinedportion of the drum. The springs act to hold the pattern segments infirm engagement with the inclined vfaces of the drum. The side faces 31of the pattern segments are beveled so that such segments will slip intoclose engagement with each other and present an unbroken pattern face,and it therefore follows that it -is impracticable, after the sand moldhas been formed, to withdraw all of the segments simultaneously, lt istherefore necessary that certain of the segments be withdrawn radiallyfrom the mold prior to the withdrawal of others thereof, and in thepresent embodiment of the machine each alternate segment is partlywithdrawn before its companion segments are withdrawn, and to en ablethis to be done, the fastening screws are provided with different sizedheads. For instance, the fastening device of each segment which is to bewithdrawn prior to its companion segment has a somewhat longer and widerhead, as 25a, as shown at the right in Fig. 6, than the fastening.devices 25h. ln consequence, on the rotation of the hand-wheel, whenthe drum is moved downward, see F ig. 6, the washers of the screws 25Lwill engage the heads of such fastening-devices, owing to the smalldistance which they have to travel prior to the engagement of thewashers with the heads 25h, so that the first set of pattern segmentswill be sp artly withdrawn, as shown for instance at the left-hand sideof Fig. e., before the companion segments are started. 1When, however,the drum has been further shifted the washers -of lthescrews 25b willengage lthe heads of such screws, whereupon such companion segments willalsobe withdrawn, see Fig. 4 at the right thereof, this movement of thedrum .also further withdrawing `those segments which were ialreadypartly withdrawn. Thereversal ofthe handwheel, lof course, will move thekdrum upwardly and shift the segments into proper position to form a newmold.

Vlfhen it .is desired that the mold teeth shall have a face of lessdepth than the Afull depth of the pattern teeth, this is accomplished byadjusting the pattern with relation .to @the mold box, or vice versa,this being accomplished by providing the brackets A8 with adjustingscrews .7 engaging the bottom plate `of the pattern, so that onadjusting the screws, as shown for instance in Figs. 2 and 3, either thewhole or a half, or anydesired portion, of the pattern may be left inrposition to form the desired face of the teeth.

l claim as my invention:

1. In a mold-forming machine, the combination of a series of radially`movable pattern sections sufficient in number to form the completeApattern when assembled, each having a gear-tooth-formed face and meansfor movingI all of said vpattern sections radially away from the mold.2. ln a mold-forming machine, the combination of a series of radiallymovable .pattern sections .all of substantially the vsame size andsufficient in number to form .the complete pattern, and means for movingall of said sections radially away from the mold, each alternate oneahead of its companion section.

3. ln a mold-forming machine, the combination of a series of radiallymovable toothed pattern segmentsall of substantially the same size andsufficient in number to 4form the complete pattern, .and means formoving all of said segments radially away from the mold, some aheadofothers.

4. In a mold-forming machine, the combination of supporting means, amoimted thereon for reciprocation and having an inclined periphery,means for moving said drum on its supporting means, and pattern segmentsall of substantially the same size and each having an inclined faceengaging the inclined periphery' of said drum, j

whereby on the movement of said drum the pattern segments will be movedradially.

5. in a mold-forming machine, the combination of supporting means, adrum mounted thereon for reciprocation and having an inclined periphery,means for reciprocating said drum, a series of segments having inclinedrear faces engaging the inclined periphery of said drum andgeartoothformed faces, means for securing the segments to the drum, andguiding means for the segments whereby on the movement of said drum thesegments will be moved radially.

6. In a mold-forming machine, the combination of supporting means, adrum mounted thereon for reciprocation and having an inclined periphery,a series of pattern segments carried by said supporting means and havinginclined rear faces engaging the inclined face of said drum, said drumhaving slots, one for each segment, and means working in said slots forfastening the segments to the drum whereby on the reciprocation of thedrum the segments will be moved radially, each ef said means comprisinga headed device, a washer in engagement with the drum, and a springbetween said washer and the head of said device whereby each segment ismaintained in close engagement with said drum.

7. In a mold-forming machine, the combination of supporting means, adrum mounted thereon for reciprocation and having an inclined periphery,a series of pattern segments carried by said supporting means and havinginclined rear faces engaging the inclined face of said drum, said drumhaving slots, one for each segment, and means working in said slots forfastening the segments to the drum whereby on the reciprocation of thedrum the segments will be moved radially, each of said means comprisinga headed device, a washer in engagement with the drum, and a springbetween said washer and the head of said device whereby each segment ismaintained in close engagement with said drum, the heads of some of saiddevices being longer than the heads of companion devices whereby some ofthe segments will be moved radially prior to the movement of companionsegments.

8. In a mold-forming machine, the combination of a supporting means, adrum mounted thereon for reciprocation and having an inclined peripheria series of pattern segments carried by said supporting means and havinginclined rear faces engaging the drum inclined face of said drum, saiddrum having slots, one for each segment, and means working in said slotsfor fastening the segments to the drum whereby on the reciprocation ofthe drum the segments will be moved radially, each of said meanscomprising a headed device, a washer in engagement with the drum, and aspring between said washer and the head of said device whereby eachsegment is maintained in close engagement with said drum, the head ofeach alternate fastening device being longer than the head of itscompanion device, whereby each alternate segment will be moved radiallyprior to its companion segment.

9. In a mold-forming machine, the combination of a mold-box having abottom provided with an opening, a pattern made up oi' a series ofradially movable segments, each having a gear-tooth-formed face, meansfor moving said segments radially, and means for adjusting one of saidparts with relation to the other.

10. In a mold-forming machine, the combination of a mold-box having abottom provided with an opening, a pattern made up of a series ofradially movable segments, means for moving said segments radially, andmeans for adjusting one of said parts with relation to the other, saidmeans comprising brackets secured to one of said parts and carryingadjusting screws in engagement with the other part.

1l. In a mold-forming machine, the combination of a mold-box having abottom provided with an opening, a pattern made up of a series ofradially movable segments, means for moving said segments radially, andmeans for adjusting one of said parts with relation to the other, saidmeans comprisingbrackets secured to one of said parts and carryingadjusting screws in engagement with the underside of the other of saidparts.

l2, In a mold-forming machine, the combination with a mold-box having abottom, of a pattern comprising a series of toothformed segments, theedge oi' said mold-box bottom conforming to the shape of said toothedsegments, and means for adjusting one of said parts relatively to theother.

13. In a mold-forming machine, the combination with a mold-box having abottom, of a pattern comprising a series of toothformed segments, theedge of said mold-box bottoni conforming to the shape of said toothedsegments, and means for adjusting one of said parts relatively to theother, said means comprising brackets carried on the underside of themold-box bottom and having adjusting screws in engagement with theunderside of the pattern.

14. In a mold-forming machine, the combination with a mold-box having abottom provided with an opening, of a pattern liO located therein andcomprising a servies of .toothed segments, means for moving saidsegments radially With relation :to the lbox, and means for adjustingone of said parts vertically with relation to the yother thereby .toregulate the face of the Vmolded teeth.

15. In a mold-forming machine, the com bination with ,a mold-box thebottom of `Which .is provided With an opening, of a pattern locatedtherein and comprising a series of toothed segments, zmeans forsupporting said segments, and means for moving said segments radiallyrelatively -to said box.

116. In a `mold-forming machine, the ,come bination with a mold-:box thebottom of which is provided with an opening, of a pattern locatedtherein and comprising a series of toothed segments, means forsupporting said segments, .and means l'or moving said segments radiallyrelatively to said box, some prior to others.

17. In a mold-forming machine, the combination with a mold-box the.bottom of which is provided with an opening, of a pattern locatedtherein and comprising a series of toothed segments, means forsupporting said segments, and means for moving said segments radiallylrelatively to said box and in alternation.

18. In a mold-forming machine, the combination of mold-box, a patterncomprising top and bottom plates, a series `of segments guidedtherebetween for movement radially toward vand from said mold-box andeach having a gear-tooth-formed face, a drum supported between saidplates and having an inclined periphery, and -means for reciprocatingsaid drum thereby to move the toothed segments radially relatively tosaid mold-box.

13. In a moldfforming machine, the -combination of .a mold-box, apattern com prising top and lbottom plates, a series of toothed segmentsguided therebetween for movement radially toward and from said mold-box,a drum supported between said plates and having an inclined periphery,means for reciprocating said drum thereby to move the toothed seg-mentsradially rela- Atively to said mold-box, and means for regulating thepositionyof said drum.

20. In a mold-forming machine, the combination of a mold-box, a seriesof radially Vmovable toothed pattern sections, said box having a bottomhaving its inner edge conforming to and 'fitting the faces of saidtoothed sections, means for moving said pattern sections radially, andmeans for adjusting one of said parts vertically with relation to theother .thereby to determine the Width of the face of the mold.

21. In a mold-forming machine, the combination of a mold-boX, a seriesof radially movable vtoothed pattern segments, said :box having anannular bottom having its inner -edge conforming to and fitting thefaces of said segments, means for moving said pattern segments radially,and means for adjusting said segments vertically with relation to saidmold-'box therebyto determine the Width of face ofthe mold.

22. In a mold-forming machine, the combination of a series of movabletoothed segments sufficient in number to form the complete pattern Whenassembled, and means for shifting said segments to increase or decreasethe diameter ofthe pattern.

23. In a mold-forming machine, the combination of a series of movabletoothed segments suflicient in number to form the .complete pattern Whenassembled, and each having a gear-tooth-formed face, and Wedgeshapedmeans for shifting said segments, some prior to others, -to increase ordecrease the diameter of .the pattern.

24. In a mold-forming machine, the combination of a series of movabletoothed segments sufl'lcient in number to form the com.- plete patternand all of substantially the same size, Wedge-shaped means for shiftingsaid segments, some prior to others, to increase or decrease thediameter of the pattern, and rotating means for operating saidWedge-shaped means.

FREDERICK A. PHELPS.

Iitnesses LYsANvDER E. WRIGHT, BRANDON HENDRIoKs.

